i belive its the carb,mixture screws out far to get some what of smooth idle,but now idles to high,compleat new ing system,car still bogs,some times with a lean missfire.this carb was rebuilt last fall by a out state reman company,there no help,90 day waranty is up,also still leaks at botom of float bowl.i have check for vacuum leaks.none,vacuum gauge needle is not jumping around.i pulled intake of yesterday,didnot see any sighs of leakage,camshaft looks good.also high speed miss or surge at times.can't figure this one out.wanted new or rebuilt to install,keep out carb for parts,i belive bowl is cracked .thanks.